Jewel oliving machine



Feb. 6, 1945. WEAVER JEWEL OLIVING MACHINE Filed Oct. 1, 1942 2Sheets-Sheet 1 FIG. i

INVENTOR. HARRY D. WEAVER BY 1945 H. D. WEAVER JEWEL OLIVING MACHINEFiled Oct. 1, 1942 2 Sheets-Sheet 2 IN V EN T 0R.

Illllllllllllllllllllll BYHA RRY 0. WEAVER FIG. 5

Patented Feb. 6, 1945 UNITED STATES, PATENT OFFICE 2,369,094 JEWELomvnvo MACHINE Harry Dewey Weaver, Lancaster Township, Lancaster County,Pa., assignor to Hamilton Watch Company, Lancaster, Pa.

Application October 1, 1942, Serial No. 60,395

I 3 Claims.

This invention is directed to improvements in apparatus for olivingjewels such as used in the watchmaking industry. While the invention ismainly intended for that step in the processing of watch jewels known asoliving, it is capable of being utilized Wherever there is need ofinternal grinding, polishing, reaming or finishing of small parts eitherjewels or metallic.

The term oliving refers to the rounding of the internal edges of thebore of watch jewels to reduce the friction between the jewel and theshaft mounted therein.

the property of the diamond of splittingand always presenting a sharpedge makes this the only practical material to use. is of courseimportant. The use of excessive amounts of this dust would materiallyincrease the cost of production. An apparatus, therefore,

.which uses only a small amount of diamond dust and allows practicallyno waste is necessary. There is also the time element to be considered.In boring a jewel, which may be done by a battery of machines attendedby a single operator each boring operation takes between eight andfifteen minutes, depending on the size of the jewel. I'he oliving whichmust have manual manipulation during the operation takes a proportionaltime. The oliving machine must therefore overcome the time element inorder to be practical. As watches are of many sizes and each individualwatch has different size jewels, this machine must also. be adjustableto accommodate many different sizes. The apparatus of the presentinvention is designed to meet and surmount these difiiculties which arepresent with machines now in use.

The object of this invention is to provide an apparatus which willrapidly and accurately olive the jewel.

A further object is to provide a jewel oliving apparatus which can beadjusted to different size jewels.

A further object is to provide a jewel oliving apparatus which iseconomical in use of cutting material.

A further object is to provide a jewel oliving apparatus which willperform the necessary operation in a minimum of time.

still further object is to .provide an apparatus which may be used inthe enlarging, ream- The problem of costing, grinding or polishing ofthe bore of small parts.

The invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a side elevation of the oliving machine with a jewel shownwith the wire but without the bow.

Fig. 2 is a top plan of the machine.

Fig. 3 is a front view of the bow with several jewels strung on the bowwire.

Fig. 4 is an end View partly in section showing the bow in olivingpositions and with the dust carrying post removed.

Fig. 5 is a. section of the jewel before and after oliving.

The oliving apparatus-comprises a base I l upon which a stationary unitcarrying the driving wheel and one driven wheel and a movable unitcarrying the second driven wheel are mounted.

Standards I2 and I3 carry in appropriate bearings a drivin shaft l4 uponwhich is carried a centrally mounted driven wheel l5. This Wheel I5 is.formed of Lucite, hard rubber, hard leather or a like material having afairly high coefficient of friction as its driving contact isfrictional. Mounted also on shaft [4 and secured thereto by set screws(not shown) are pulleys l6 and I1, pulley 16 being smaller than H togive variation in speed if needed. The shaft is journaled in nylon highspeed bearings l8 (Fig. 4) which have an oil feed through oil cups ismounted on bearing sleeves 20. These sleeves 28 set at their inner ends2|, in recesses 22 to prevent the diamond dust from contacting thebearing. Guards 23 carried outwardly ou the ends of the sleeves alsoserve to prevent the entrance of the diamond dust to the shaft bearings.Set screws 24 permit easy removal and replacement of the bearings afterwear has rendered them useless.

The shaft I4 is driven at a high rate of speed, upwards of 2200revolutions per minute through either of the pulleys l5 or H bya-twisted raw hide belt 25 which is driven in turn by a motor .through aseries of step up pulleys (which is not shown, being no part of theinvention). While the mechanism for producing the high speed is no partof the invention, the resultant high speed is essential. It is this highspeed that allows the jewel to be olived in from ten to thirty seconds.It is this rapid oliving that makes it practical to use such a machinein production work, as every jewel must be individually olived.

The standards [2 and I3 are formed with' extensions 26 which havejournaled therein a shaft 21. Mounted on said shaft is a frame 28. Thisframe carries an upper shaft 29 upon which a yoke 30 having arms 3| ispivotally carried.

Projecting outward and at right angles to said 7 in for receivingthejewel. A spring 38 tends to swing the arms 3| about the shaft '29 inwardtoward the central driving wheel which forces the wheel 35 against saiddriving wheel with sufiicient pressure to assure, transfer of rotationbetween said wheels.

A lower spring 39 engages the frame 28 and an anchor plate It!) securedto the base N. This forces the set screw 33 in the foot plate 32securely "against the contact plate it! also on the base ll. Movementof, this set screw against the plate 41 swings the frame about the shaft27 and .pro- -vides adjustment for different size jewels. A lookingscrew 42 is threaded into the foot piece and engages-the set screw 33.to securely hold it and prevent the slightest movement in theadjustment.-

A sliding base 43 is mounted for sliding movement through an upstandingridge 44 on base I1 and a slot 45 in said sliding base. A set screw 46provides the adjustment of said base to align the jewel receivingwheels. Bolts 47 securely hold this base inadjusted position.

":Similar to frame 2-8 a frame .48 is *journaled .on a shaft 49 carriedin upstanding ears 150 on :base 43. vA yoke .51 similar to yoke 3021spivotally scar.- ried by shaft 51 journaled in :t-h 'u-pper :part offrame ll. This yoke hasarms53 which support a shaft 54 carrying a jewelreceiving wheel :55

formed identical with jewel wheel 35. A spring .56 forces the jewelwheel fi l into contact with .central driving wheel :[5 while .a secondlower spring v5'! urges th :frame :against the action of a set screw 5.8similar in operation to set screw .33. This provides adjustment of thepair of jewel wheels to regulate the .distancethe one from the otherwhile the upper springs insure .contact .of

said jewel wheels with the central driving wheel. These jewel wheelsmaybe swung upward and over to allow access to the central driving shaftand wheel [5 The hand tool or .bow'ss .on-which the jewels are held isshown in Fig. 3 with .a Single J wel carries 'a small-quantity of theo'living compound 68 of olive oil and diamond dust and has an up-:standing projection 269 formed with asharp edge lll used in-separatingthe -jewels strung on the wire.

The'-jewels illustrated in *Fig 15 showthe' prod- -uct before and afterolivirig. Jewel "H is the finished jewel except 'for oliving andshows-the straight side E2 of the jewelibore. Jewelldwhich is thefinished olived jewel shows fthe rounded -;side"l4 of the bore. "Thisoliving --process as .can ":be readilyseen reduces the contact of theThe bow is formed of spring wire.

This post su ports on a level slightl friction; end bearin to tak re othrust and t must "be done with every olived jewel.

wheel 35 has a peripheral groove 3'! formed theree shaft with the jewelbearing, thus reducing the It is, of course, necessary to use an Inoperation, assuming the belt to be driven and the central driving wheelturning at approximately 2200 R. P. M., the alignment of the slidingbase and the adjustment of the'setscrews 33- and 58 tor the correct sizeto be made, the jewel li teiving wheels 35'and 55 are turningapproximately 45003. P. M. The jewels to be olived, all

of the same size are strung on the wire which is, of course, withdrawnfrom the bolt for stringing andthe wire reinserted in the bolt afterstringing, drawn taut against the spring action of the bow and secured.These jewels which may be of almost any number or only one are ready foroliving.

The operator, sitting directly i-n front- 0f the machine, in line withthe jewel receiving wheels dip the wire at a central point into thepaste formed of' diamond dust and oil. This wire Which is of softcopperretains the paste and a single jewel is slid along the wire bymeans of the projection edge l0,'the"jewels being too small to beseparated by the fingers, to a point on the wire covered with paste. Thejewel is then brought into contact with the jewel receiving wheels andin the peripheral grooves of these wheels, as shown in Figs. 1' and A.

The jewel is friction'ally'driven by the jewel receiving wheels at ahigh rate of speed, upwards I of 20,000 R.P. M. the bow being rocked apre-- determined number of time's to round the sideof the bore insa-idjewel. This operation, because of the high speed, is completed ina fewseconds varying from eight to thirty; depending on the size of thejewel. When it is considered that normally the oliving operation tookfrom four to ten minutes. the practicability of this machine isdemonstrated.

The use of olived jewels in a watch in replacement of the usual straightJbore jewel reduces the friction and allowsfiner and more accurateadjustment Whichmeans closer timekeeping.

What I claim is:

' .1. .An apparatus 'for oliving jewels comprising a base, a motordriven wheel rotatively mounted on said base, a pair of driven wheelseach'formed with a jewel retaining peripheral groove, a bow wire 'foraxially supporting a number of jewels, said bow being manuallypositioned to bring suc- -cessive jewels into wheel-contacting position.

2. An apparatus for oliving jewels having a central bore comprising abase, a motor driven wheel 'rotatively mounted on said base, a pair ofdriven wheels, each formed with a jewe1 retaining peripheral groove, abow, a "bow wire for axially supporting a number of jewels formed withcenter holes, said bow being manually operated to bring any of saidjewels to wheel-contacting position and abrading'means applied to s am:wes a

